ASoC: Support GPIO based microphone detection for WM8904
The WM8904 allows microphone detection signals to be brought out as
alternate functions of the GPIO signals which can be detected using
interrupt inputs on the CPU. Allow this to be configured using
platform data.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c
index ce3f004..c5b50d7 100644
--- a/sound/soc/codecs/wm8904.c
+++ b/sound/soc/codecs/wm8904.c
@@ -2540,6 +2540,11 @@
wm8904->reg_cache[WM8904_GPIO_CONTROL_1 + i]
= pdata->gpio_cfg[i] & 0xffff;
}
+
+ /* Zero is the default value for these anyway */
+ for (i = 0; i < WM8904_MIC_REGS; i++)
+ wm8904->reg_cache[WM8904_MIC_BIAS_CONTROL_0 + i]
+ = pdata->mic_cfg[i];
}
/* Set Class W by default - this will be managed by the Class